linux

Peter Eisentraut <peter_e@gmx.net> writes:
> Tom Lane wrote:
>> Peter Eisentraut <peter_e@gmx.net> writes:
>>> Is there a way to query the database system identifier that
>>> pg_controldata outputs from SQL?
>>
>> Don't think so.  Do you have a use-case for providing a function to
>> return that?

> I'd like to find out whether two connections are really to the same
> server.

Hmm.  Seems a bit of an odd case, but on the other hand there might be
applications for it in connection with management of backups and
WAL-shipping and so forth.  I have no objection to adding a function.

            regards, tom lane

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